Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M

CVE-2026-61690Grav: Decompression Bomb via ZipArchiver - Missing Extraction Limits

Medium 6.5

In plain English

A medium-severity security flaw in grav from getgrav. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 55.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Grav is a file-based Web platform. Prior to 2.0.1, Grav ZipArchiver::extract() in system/src/Grav/Common/Filesystem/ZipArchiver.php passes archives to ZipArchive::extractTo() without enforcing the system.gpm.archive uncompressed-size, file-count, or nesting-depth limits. Code using Archiver::create('zip') to extract an attacker-controlled archive can exhaust disk space or inodes and make the site unavailable. This issue is fixed in version 2.0.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	getgrav/grav	2.0.1	GHSA-928x-9mpw-8h56

Affected products (as reported)

Vendor	Product	Versions
getgrav	grav	< 2.0.1

Weakness: CWE-409 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56 x_refsource_CONFIRM
https://github.com/getgrav/grav/commit/1c1003cfcab5344203d6fde1aaa1f9a4ee3413ff x_refsource_MISC
https://github.com/getgrav/grav/releases/tag/2.0.1 x_refsource_MISC